3(e+3)-7(e-3)=-18

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Solution for 3(e+3)-7(e-3)=-18 equation:


Simplifying
3(e + 3) + -7(e + -3) = -18

Reorder the terms:
3(3 + e) + -7(e + -3) = -18
(3 * 3 + e * 3) + -7(e + -3) = -18
(9 + 3e) + -7(e + -3) = -18

Reorder the terms:
9 + 3e + -7(-3 + e) = -18
9 + 3e + (-3 * -7 + e * -7) = -18
9 + 3e + (21 + -7e) = -18

Reorder the terms:
9 + 21 + 3e + -7e = -18

Combine like terms: 9 + 21 = 30
30 + 3e + -7e = -18

Combine like terms: 3e + -7e = -4e
30 + -4e = -18

Solving
30 + -4e = -18

Solving for variable 'e'.

Move all terms containing e to the left, all other terms to the right.

Add '-30' to each side of the equation.
30 + -30 + -4e = -18 + -30

Combine like terms: 30 + -30 = 0
0 + -4e = -18 + -30
-4e = -18 + -30

Combine like terms: -18 + -30 = -48
-4e = -48

Divide each side by '-4'.
e = 12

Simplifying
e = 12

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